Improvement in curtain-fixtures



To all whom it muy concer-nr v f i jBeitknown that I, WILLIAM I. Yarns,otElmira, -in the county of Ghemung and State of New York, t `haveinvented a new and 4ns'efu mprovement in Ourtaili'dixtures;` andI dohereby`f". .declare`tl1at1he following is a full, clear, and exactdescription thereof, l `which will enable othersgskilled in'- the -artto make `and usethe same, reference being hadto the accomplnying drawingforming part of this speciication.`

Thisinventionrelatesto anew andusefulimprovei ment `in curtain-fixtures,having particular reference to the mode of revolving `thecurtain-roller, and coni sists in so applying the powerto the rollerthata vat .in each ijevolutiom'the curtain will balance the spring, aswlll be hereinafter more-fnlly described. Theaccompanying drawingrepresents a front view Vwhich it is revolved.` y Similar letters ofreference parts. t-

i a is the roller, which is niade `to revolve on pivots for bearings atits ends, by means of clock-work, c, at- `tacbed to thewindmvasing. y

.Bisthecurtaia p This clock-,workconsistsof a wheel, d, and .pinion c,andaeoil-spring, f. l i t One end of the spring is attached to thecross-bar g, and the other to thearbor of the wheel d.

` indicate corresponding f roller and-winds up the spring, and therecoil of the spring revolves the roller inan opposite direction, and

winds up the curtain.

riablepurchase isobtained, and so that, at one point i, t ofmydmprovedcuitaiii-ixtnre,showing the roller` with the curtainlthereon,andlthemechanism by The act'of drawing down the curtain .revolves the'"waited" gelistet @met elimine. i i i v4WILL;.an ivarnsyor riparian,ZNEW'YORK. d

` Letters Patent Np. 107,74?,` aan september 27, 1870.

IMPROVEMENT IM CURTAN'HXTURESf t Theishedule referred toin these LeticiaP'tet 'and inkug'p'c of the s'anie. l

h isv an arm on the end of the `curtain-roller pivot.

i is a crank on the end of the pinion-arbor.

The-wrist of this crank, j, is always in contact with the arm, Aandtraverses the arm nearly Afrom end toend at 'every revolution. v

Whenthe wrist j is nea-r the end of the arm, as seen inthe drawing,ita-has a long purchase, and e25- erts its greatest force" upon theroller, but when 1t l bears upon the arm at a point near the axis orpivot, j (as vwhen its position on the arm is reversed,)V it exerts linta slight force upon the roller, and the curtain will balance the spring.A

It will' tiIlls be seen that, at' one point in each revolution itli'eroller, the curtain may remain stationl ary. A slight pull upon thecurtain when it is thus held stationary will alter the position of thewrist on d the arm, giving it more lever purchase, `and wind up thecurtain, ,morev or less, as may be"`desired. 'llieA momentum of themoving'part's carries the roller past necessary to draw down suiicientiyhard to counteract the force ofthe spring.

'Having thusdescribed my invention,

I claim as new and desire to secure by. Letters Patentt t In combinationwith a curtain-roller, the clock-work c, the arm h, and the crank t,arranged and operating substantially as and for-the purposes described.Y

- WILLIAM P.- YATES.-

Witnesses:

WM. H. Gasse, WM. L. Hman.

